Can anyone tell the difference between abstract class and an Interface in Java??

Question

Both of them contains method without its definition right?

Answer 1

Interfaces have abstract Methods. For example.

public interface Series
int getNext(); //return next number in Series
void reset(); //restart
void setStart (int x); //set starting value

Answer 2

abstract class can contain both static and non static data members, abstract method but interface contains only static data members and abstract methods

Answer 3

abstract class allows constructor but interface not allows constructor..

Answer 4

Thanks vasu